WO2024021828A1

WO2024021828A1 - Electronic expansion valve, and refrigeration apparatus

Info

Publication number: WO2024021828A1
Application number: PCT/CN2023/096668
Authority: WO
Inventors: 杨茂; 陈超; 曾庆军
Original assignee: 广东威灵电机制造有限公司
Priority date: 2022-07-27
Filing date: 2023-05-26
Publication date: 2024-02-01
Also published as: CN117515195A

Abstract

An electronic expansion valve, comprising a valve seat (100), a connecting seat (200), a guide sleeve (300) and a support structure (400). A port (110) is formed at an end of the valve seat; a valve cavity (120) in communication with the port is formed in the valve seat; the connecting seat is arranged at the port; the guide sleeve is arranged in the valve cavity, and the guide sleeve is connected to the connecting seat; and the support structure (400) is arranged on the valve seat, and abuts against a lower end face of the guide sleeve so as to support the guide sleeve. Further disclosed is a refrigeration apparatus comprising the electronic expansion valve.

Description

Electronic expansion valve and refrigeration equipment

This application claims priority to the Chinese patent application with application number 202210894849.2 filed on July 27, 2022, the entire content of which is incorporated into this application by reference.

Technical field

The present application relates to the technical field of fluid control components, and in particular to an electronic expansion valve and refrigeration equipment.

Background technique

The electronic expansion valve is an important component in the refrigeration system. It mainly plays the role of throttling, reducing pressure and regulating flow. In related technology, an electronic expansion valve includes a valve seat assembly, a nut assembly, a valve core assembly, a magnetic rotor assembly and other components. The valve seat assembly has a valve port. When the electronic expansion valve works, it is driven by an energized coil surrounding the valve housing. The magnetic rotor assembly rotates, thereby driving the valve needle assembly to move axially, thereby controlling the opening or closing of the valve port, thereby achieving the functions of throttling, reducing pressure and regulating flow.

When the connecting seat and guide sleeve in the electronic expansion valve adopt a split structure design, the connecting seat and the guide sleeve need to be fixedly connected together. Since the medium pressure will exert a downward force on the guide sleeve when the electronic expansion valve is working, It may cause the connection between the connecting seat and the guide sleeve to be unstable, and the guide sleeve to slide downward, thus affecting the use of the electronic expansion valve.

technical problem

The main purpose of this application is to propose an electronic expansion valve aimed at improving the stability of the connection between the connecting seat and the guide sleeve.

Technical solutions

In order to achieve the above purpose, this application proposes an electronic expansion valve. The electronic expansion valve includes a valve seat, a connecting seat, a guide sleeve and a support structure; a port is formed on one end of the valve seat, and a port is formed in the valve seat. A valve cavity with connected ports; the connecting seat is arranged on the port; the guide sleeve is arranged on the valve cavity, and the guide sleeve is connected to the connecting seat; the support structure is arranged on the valve seat, and It is in contact with the lower end surface of the guide sleeve to support the guide sleeve.

In one embodiment, a limiting portion is provided on the inner wall of the valve seat, the lower end surface of the guide sleeve is in contact with the limiting portion, and the limiting portion forms the support structure.

In one embodiment, a first stepped hole is provided in the valve seat, and the first stepped hole divides the valve chamber into a first valve chamber and a second valve chamber, and the first stepped hole is connected to the first stepped hole. The first valve chamber and the second valve chamber are both connected; the inner diameter of the first step hole is larger than the inner diameter of the second valve chamber, the lower end surface of the first step hole forms the support structure, and the guide The sleeve is inserted into the first step hole, and the lower end surface of the guide sleeve is in contact with the support structure.

In one embodiment, the port is connected to the first valve chamber, the inner diameter of the port is greater than the inner diameter of the first valve chamber, the lower end surface of the port forms a first contact surface, and the connecting seat It includes a positioning section and an extension section. The positioning section is connected to the extension section. The outer diameter of the positioning section is greater than the outer diameter of the extension section. The lower end surface of the positioning section is connected to the first contact surface. The distance between them is D, 3 mm>D>0.1 mm.

In one embodiment, the electronic expansion valve further includes a sealing structure, the sealing structure includes a first sealing member, a first groove is formed on the outer wall of the guide sleeve, and the first sealing member is disposed on the The first groove is in contact with the inner wall surface of the valve seat; or the inner wall surface of the valve seat is provided with a first groove, and the first sealing member is disposed in the first groove and is in contact with the inner wall surface of the valve seat. The outer wall surfaces of the guide sleeve are in contact with each other.

In one embodiment, the sealing structure further includes a second sealing member, the outer wall surface of the connecting seat is provided with a second groove, the second sealing member is provided in the second groove, and the second sealing member is disposed in the second groove. The sealing member is in contact with the inner wall surface of the valve seat; or, the inner wall surface of the valve seat is provided with a second groove, the sealing member is disposed in the second groove, and the second sealing member is in contact with the inner wall surface of the valve seat. The outer wall surface of the connecting seat is in contact with each other.

In one embodiment, the connection base has a first through hole and a second through hole connected to the first through hole, the guide sleeve includes a mounting portion, and the mounting portion extends into the second through hole. And connected with the connecting base.

In one embodiment, the connecting seat and the guide sleeve are welded.

In one embodiment, the connecting seat is made of stainless steel, the guide sleeve is made of aluminum alloy, and the connecting seat is riveted to the guide sleeve.

In one embodiment, the electronic expansion valve further includes a valve port seat and a valve needle assembly. The valve port seat is provided on the guide sleeve. The valve port seat has a valve port. The first valve chamber is connected to the second valve needle assembly. The valve chamber can be communicated through the valve port; the valve needle assembly is movably provided on the guide sleeve, the valve needle assembly includes a valve stem and a valve head connected to the valve stem, the valve head is movable is inserted into the valve port, and the valve stem can reciprocate along the axial direction of the valve port to drive the valve head to open or close the valve port.

In one embodiment, the valve seat further has a first interface and a second interface, the guide sleeve has a medium flow chamber, the first interface is connected to the first valve chamber, and the first valve chamber is connected to the first valve chamber. The medium flow chamber is connected, the valve port is connected with the second valve chamber, and the second valve chamber is connected with the second interface; when the valve head opens the valve port, the first The interface is connected to the second interface.

In one embodiment, the electronic expansion valve further includes a nut assembly and a rotor assembly. The nut assembly is threadedly connected to the valve needle assembly. The rotor assembly is sleeved on the valve needle assembly and can drive the valve needle assembly. The valve needle assembly rotates relative to the nut assembly, so that the valve stem reciprocates along the axial direction of the valve port to drive the valve head to open or close the valve port.

This application also proposes a refrigeration equipment, which includes the electronic expansion valve. The electronic expansion valve includes a valve seat, a connecting seat, a guide sleeve and a support structure; a port is formed on one end of the valve seat, and a valve cavity connected to the port is formed in the valve seat; the connecting seat is provided on the The port; the guide sleeve is provided in the valve cavity, and the guide sleeve is connected to the connecting seat; the support structure is provided on the valve seat and abuts with the lower end surface of the guide sleeve for Support the guide sleeve.

In one embodiment, the refrigeration equipment is an air conditioner, a freezer, a refrigerator or a heat pump water heater.

Description of drawings

In order to explain the embodiments of the present application or the technical solutions in the prior art more clearly, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are only These are some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on the structures shown in these drawings without exerting creative efforts.

Figure 1 is a schematic structural diagram of an embodiment of the electronic expansion valve of the present application;

Figure 2 is an enlarged view of point A in Figure 1;

Figure 3 is an enlarged view of B in Figure 1;

Figure 4 is a schematic structural diagram of the valve seat of the electronic expansion valve in Figure 1;

Figure 5 is a schematic structural diagram of the connecting seat of the electronic expansion valve in Figure 1;

FIG. 6 is an exploded view of part of the structure of the electronic expansion valve in FIG. 1 .

Explanation of reference numbers:

label	name	label	name
10	Electronic expansion valve	310	first groove
100	valve seat	320	Installation Department
110	port	330	Media flow chamber
111	first contact surface	340	Installation port
120	Valve cavity	400	supporting structure
121	first valve chamber	410	Limiting part
122	Second valve chamber	500	Sealed structure
130	first step hole	510	first seal
140	first interface	520	Second seal
150	Second interface	600	Valve seat
200	Connecting seat	610	valve port
210	positioning segment	700	Valve needle assembly
220	extension	710	Stem
230	second groove	720	Valve head
240	first through hole	800	nut assembly
250	second through hole	900	Rotor assembly
300	Guide sleeve	1000	valve housing

The realization of the purpose, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings.

Embodiments of the invention

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of this application.

It should be noted that if there are directional instructions (such as up, down, left, right, front, back...) in the embodiments of the present application, the directional instructions are only used to explain the position of a certain posture (as shown in the drawings). (display) relative positional relationship, movement, etc. between the components. If the specific posture changes, the directional indication will also change accordingly.

In addition, if there are descriptions involving “first”, “second”, etc. in the embodiments of this application, the descriptions of “first”, “second”, etc. are only for descriptive purposes and shall not be understood as indications or implications. Its relative importance or implicit indication of the number of technical features indicated. Therefore, features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In addition, if "and/or" appears in the full text, it means including three parallel plans, taking "A and/or B" as an example, including plan A, or plan B, or a plan that satisfies both A and B at the same time. . In addition, the technical solutions in various embodiments can be combined with each other, but it must be based on the realization by those of ordinary skill in the art. When the combination of technical solutions is contradictory or cannot be realized, it should be considered that such a combination of technical solutions does not exist. , nor is it within the scope of protection required by this application.

This application proposes an embodiment of an electronic expansion valve. The electronic expansion valve is an important component in the refrigeration system and mainly plays the role of throttling, reducing pressure and regulating flow. Existing electronic expansion valves include a valve seat, a nut assembly and a valve needle assembly threaded with the nut assembly. The magnetic rotor assembly is used to drive the valve needle assembly to produce axial movement to adjust the opening of the valve port, thereby achieving medium flow control. In the electronic expansion valve of this application, the connecting seat and the guide sleeve are arranged separately, and a support structure is provided at the lower end of the guide sleeve. The guide sleeve is supported through the support structure to prevent the medium pressure from causing damage to the guide sleeve when the electronic expansion valve is working. The downward force causes the connection between the connecting seat and the guide sleeve to be unstable, causing the guide sleeve to slide downward.

The electronic expansion valve of the present application can be applied to an air conditioning system. The fluid medium flowing through the electronic expansion valve is the refrigerant used for heat and cold exchange in the air conditioning system. At this time, the electronic expansion valve is installed at the evaporator inlet of the air conditioning system. The electronic expansion valve serves as the dividing element between the high-pressure side and the low-pressure side of the air-conditioning system, throttling and depressurizing the high-pressure liquid refrigerant from the liquid storage dryer and other devices, thereby Adjust and control the amount of liquid refrigerant entering the evaporator so that the amount of liquid refrigerant can adapt to the requirements of the external refrigeration load. Alternatively, the electronic expansion valve is applied to other types of refrigeration equipment. The fluid medium flowing through the electronic expansion valve can also be other fluid media besides refrigerant, as long as the electronic expansion valve can achieve throttling and pressure reduction of the fluid medium. That’s it, there are no specific restrictions on this.

Please refer to Figures 1 to 6. In one embodiment of the present application, the electronic expansion valve 10 includes a valve seat 100, a connecting seat 200, a guide sleeve 300 and a support structure 400; a port 110 is formed on one end of the valve seat 100 , a valve chamber 120 connected to the port 110 is formed in the valve seat 100; the connecting seat 200 is provided at the port 110; the guide sleeve 300 is provided at the valve cavity 120, and the guide sleeve 300 Connected to the connecting seat 200; the support structure 400 is provided on the valve seat 100 and contacts the lower end surface of the guide sleeve 300 to support the guide sleeve 300. The valve seat 100 also has a valve cavity 120, and the valve cavity 120 is connected with the port 110. A first interface 140 and a second interface 150 can also be provided on the valve seat 100. The first interface 140 and the second interface 150 is used to connect pipes. The first interface 140 and the second interface 150 can be connected through the valve cavity 120, so that the fluid medium can enter from the first interface 140 and flow out from the second interface 150 through the valve cavity 120; conversely, the fluid medium can also It enters from the second interface 150 and flows out from the first interface 140 through the valve chamber 120. That is, the fluid medium can flow into the valve chamber 120 from any one of the first interface 140 or the second interface 150 and flow out from the other port. . In one embodiment, the fluid medium flows into the valve chamber 120 from the first interface 140 and flows out from the second interface 150 .

It should be emphasized that the valve seat 100 of the electronic expansion valve 10 can be a valve seat 100 specially used to install the guide sleeve 300, the connecting seat 200 and other electronic expansion valve components to form a separate electronic expansion valve 10, or, The valve seat 100 can also be the valve seat 100 of an integrated module. The valve seat 100 of the integrated module can be installed with electronic expansion valve components such as the guide sleeve 300 and the connecting seat 200 of the present application, as well as other structural components. The valve seat 100 can be made of stainless steel, aluminum, or other materials, and there is no specific limitation on this. The shape of the valve seat 100 may be cylindrical, square or other special shapes. A port 110 is formed on one end of the valve seat 100. The port 110 is specifically a stepped hole. The connecting seat 200 is fixedly installed in the stepped hole. To facilitate later disassembly and assembly, the connecting seat 200 can be connected to the stepped hole. inner wall threaded connection.

The guide sleeve 300 is disposed in the valve chamber 120 and is located below the connecting seat 200. The guide sleeve 300 is connected to the connecting seat 200. The guide sleeve 300 can be fixedly connected to the connecting seat 200, or can be fixedly connected to the connecting seat 200. The connecting base 200 can be movablely connected in many ways, such as riveting, welding, clamping, etc., or it can be connected through a connecting structure, or sealed through a sealing structure, and there is no specific restriction on this. The diameter of the connecting seat 200 in this application is larger, and the diameter of the guide sleeve 300 is smaller. The two are set up separately, and the guide sleeve 300 and the connecting seat 200 are connected together. The guide sleeve 300 and the connecting seat 200 are separately processed. During processing, the machining allowance is small and the processing time is short, which can improve production efficiency; at the same time, the machining allowance is small, which can further reduce the loss of raw materials and reduce costs; further, when pairing the guide sleeve 300 and the connecting seat 200 When processing separately, the degree of wear on the cutting tools is also small, and there is no need to replace the cutting tools frequently, which increases the service life of the cutting tools and further reduces the cost.

The support structure 400 is disposed in the valve seat 100, specifically on the inner wall of the valve chamber 120. The support structure 400 abuts the lower end surface of the guide sleeve 300, and is mainly used to support the guide sleeve 300 and provide an upward direction for the support of the guide sleeve 300. At the same time, it also limits the downward movement of the guide sleeve 300, so that when the electronic expansion valve 10 is working, the medium pressure exerts a downward force on the guide sleeve 300. This force can be offset by the support structure 400 to improve the connection seat. The stability of the connection between 200 and the guide sleeve 300 prevents the guide sleeve 300 from sliding downward. As for the type of the support structure 400 , the support structure 400 can be a blocking ring extending inwardly from the inner wall of the valve chamber 120 , or a stopper extending inwardly from the inner wall of the valve chamber 120 . The valve cavities 120 may be arranged at intervals in the circumferential direction, and may also have other similar structures, as long as they can support the guide sleeve 300, and there is no specific limitation on this.

The electronic expansion valve 10 of the present application includes a valve seat 100, a connecting seat 200, a guide sleeve 300 and a support structure 400; a port 110 is formed at one end of the valve seat 100, and a port 110 is formed in the valve seat 100 to communicate with the port 110. The valve chamber 120; the connecting seat 200 is provided at the port 110; the guide sleeve 300 is provided at the valve chamber 120, and the guide sleeve 300 is connected to the connecting seat 200; the support structure 400 is provided at the valve chamber 120. The valve seat 100 is in contact with the lower end surface of the guide sleeve 300 to support the guide sleeve 300 . Accordingly, the downward force exerted by the medium pressure on the guide sleeve 300 can be offset by the support structure 400 to improve the stability of the connection between the connecting seat 200 and the guide sleeve 300 and prevent the guide sleeve 300 from sliding downward.

Please refer to Figures 1, 2 and 4. In one embodiment, a limiting portion 410 is provided on the inner wall of the valve seat 100, and the lower end surface of the guide sleeve 300 is in contact with the limiting portion 410. The limiting portion 410 forms the supporting structure 400 . Specifically, a limiting portion 410 can be provided on the inner wall of the valve chamber 120 and located below the guide sleeve 300 . The limiting portion 410 contacts the lower end surface of the guide sleeve 300 and can support the guide sleeve 300 . As for the type of the support structure 400 , the support structure 400 can be a blocking ring extending inwardly from the inner wall of the valve chamber 120 , or a stopper extending inwardly from the inner wall of the valve chamber 120 . The valve cavities 120 may be arranged at intervals in the circumferential direction, and may also have other similar structures, as long as they can support the guide sleeve 300, and there is no specific limitation on this.

Please refer to Figure 4. In one embodiment, a first stepped hole 130 is provided in the valve seat 100. The first stepped hole 130 divides the valve chamber 120 into a first valve chamber 121 and a second valve chamber. 122. The first stepped hole 130 is connected to both the first valve chamber 121 and the second valve chamber 122; the inner diameter of the first stepped hole 130 is larger than the inner diameter of the second valve chamber 122, and the The lower end surface of the first step hole 130 forms the support structure 400 , the guide sleeve 300 is inserted in the first step hole 130 , and the lower end surface of the guide sleeve 300 abuts the support structure 400 . Specifically, by providing the first step hole 130 in the valve seat 100, the bottom surface of the first step hole 130 serves as the support structure 400 for supporting the guide sleeve 300, without having to separately provide the support structure 400 in the valve cavity 120, which can improve efficiency. At the same time, the support structure 400 is integrally formed with the valve seat 100. The support structure 400 has high strength, can better support the guide sleeve 300, and can withstand the direction of the guide sleeve 300 caused by greater medium pressure. The lower acting force further improves the stability of the connection between the connecting seat 200 and the guide sleeve 300.

Please refer to Figures 3 and 4. In one embodiment, the port 110 is connected to the first valve chamber 121, and the inner diameter of the port 110 is greater than the inner diameter of the first valve chamber 121. The lower end surface forms a first contact surface 111. The connection seat 200 includes a positioning section 210 and an extension section 220. The positioning section 210 is connected to the extension section 220. The outer diameter of the positioning section 210 is larger than the extension section. The outer diameter of 220, the distance between the lower end surface of the positioning section 210 and the first contact surface 111 is D, 3 mm>D>0.1 mm.

Specifically, when assembling the components in the electronic expansion valve 10, the connecting seat 200 and the guide sleeve 300 are usually assembled together first, and then they are pressed into the valve seat 100 together. When the connecting seat 200 is installed into the valve seat 100, the first contact surface 111 will limit the lower end of the positioning section 210. At the same time, the positioning section 210 has external threads, and the inner wall surface of the port 110 has internal threads. The positioning section 210 is threadedly connected to the inner wall surface of the port 110 . Considering that there will be errors during the production of parts, and to prevent the lower end surface of the guide sleeve 300 from being in contact with the upper end surface of the support structure 400 after the guide sleeve 300 is installed into the valve seat 100, the support structure 400 cannot contact the guide sleeve. 300 plays a supporting role, so when the electronic expansion valve 10 is working, the support structure 400 cannot offset the downward force exerted by the medium pressure on the guide sleeve 300. Therefore, the lower end surface of the positioning section 210 reaches the third There is a certain distance D between the contact surfaces 111. The distance D is not more than 3 mm and not less than 0.1 mm, so as to improve the stability of the connection between the connecting seat 200 and the guide sleeve 300 and prevent the guide sleeve 300 from downwards. slide. If D is greater than 3 mm, it is not conducive to the miniaturization and lightweight design of the electronic expansion valve 10; if D is less than 0.1 mm, the processing accuracy of the guide sleeve 300 and the mounting seat is required to be high, and interference is likely to occur after assembly.

Please refer to FIGS. 1 to 3 . In one embodiment, the electronic expansion valve 10 further includes a sealing structure 500 . The sealing structure 500 includes a first seal 510 . The outer wall of the guide sleeve 300 is provided with a first sealing member 510 . Groove 310. The first seal 510 is disposed in the first groove 310 and contacts the inner wall surface of the valve seat 100; or, the inner wall surface of the valve seat 100 is provided with a first groove. 310. The first seal 510 is disposed in the first groove 310 and contacts the outer wall surface of the guide sleeve 300.

Specifically, the first seal 510 can be a rubber ring. The rubber ring is elastic. The rubber ring is placed in the first groove 310. The first groove 310 can play a better role in sealing the first seal 510. Limiting effect. The first groove 310 is opened on the outer wall surface of the lower end of the guide sleeve 300 , and the position of the first groove 310 is lower than the first interface 140 . The first sealing member 510 can be in contact with the inner wall surface of the valve seat 100 or the outer wall surface of the guide sleeve 300. The first sealing member 510 is assembled using an interference fit. After the assembly is completed, the first sealing member 510 will Deformed and tightly contacted with the inner wall surface of the valve seat 100 or the outer wall surface of the guide sleeve 300, so that the guide sleeve 300 and the valve seat 100 are sealingly connected, thereby improving the sealing performance of the connection between the guide sleeve 300 and the valve seat 100. , prevent the fluid medium from flowing out through the connection between the guide sleeve 300 and the valve seat 100, and avoid internal leakage of the electronic expansion valve 10 during use.

Further, the outer wall surface of the connecting seat 200 is provided with a second groove 230 , the second sealing member 520 is provided in the second groove 230 , and the connection between the second sealing member 520 and the valve seat 100 is The inner wall surface abuts; or, the inner wall surface of the valve seat 100 is provided with a second groove 230, the sealing member is provided in the second groove 230, the second sealing member 520 and the connecting seat 200 The outer wall surface is in contact.

Specifically, the second sealing member 520 can be a rubber ring. The rubber ring is elastic. The rubber ring is placed in the second groove 230. The second groove 230 can play a better role in sealing the second sealing member 520. Limiting effect. The position of the second groove 230 is higher than the position of the first groove 310 and is located above the first interface 140 . The second sealing member 520 can be in contact with the inner wall surface of the valve seat 100. The second sealing member 520 is assembled using an interference fit. After the assembly is completed, the second sealing member 520 will deform and tightly contact the valve seat 100. The inner wall surfaces of the valve seat 200 are in contact with each other, so that the connection seat 200 and the valve seat 100 are sealingly connected. Of course, the second groove 230 can also be opened on the inner wall surface of the valve seat 100 so that the second seal 520 contacts the outer wall surface of the connecting seat 200. There is no specific limit on the position of the second groove 230.

Please refer to FIGS. 1 to 6 . In one embodiment, the connection base 200 has a first through hole 240 and a second through hole 250 connected with the first through hole 240 . The guide sleeve 300 includes a mounting portion. 320. The mounting portion 320 extends into the second through hole 250 and is connected to the connection base 200. Specifically, the mounting portion 320 extends into the second through hole 250 , the outer wall surface of the mounting portion 320 is in contact with the inner wall surface of the second through hole 250 , and part of the outer surface of the mounting portion 320 is in contact with the connecting seat 200 The lower end is in contact with each other to increase the contact area between the guide sleeve 300 and the connecting seat 200, thereby improving the stability of the connection between the connecting seat 200 and the guide sleeve 300.

For the connection between the connecting seat 200 and the guide sleeve 300, there are many connection methods. In one embodiment, the connecting seat 200 and the guide sleeve 300 are welded. Specifically, when the guide sleeve 300 and the connecting seat 200 are both made of metal, the guide sleeve 300 and the connecting seat 200 can be welded together and connected by welding, which further enhances the connection between the guide sleeve 300 and the connecting seat 200 . The stability of the 200-seat connection.

In another embodiment, the connecting seat 200 is made of stainless steel, the guide sleeve 300 is made of aluminum alloy, and the connecting seat 200 and the guide sleeve 300 are riveted. Specifically, the guide sleeve 300 and the connecting seat 200 can also be connected by riveting. After riveting, the deformation of the connection between the guide sleeve 300 and the connecting seat 200 is small, and the riveting method has low environmental requirements. The riveted parts are not easy to loosen. When welding the guide sleeve 300 and the connection base 200, the connection base 200 and the guide sleeve 300 are usually assembled together by assembly equipment, and then welded together by welding equipment. The whole process requires two machines. equipment to achieve. Compared with welding, the guide sleeve 300 and the connecting seat 200 are connected by riveting, which requires fewer processes and can be completed with only one piece of equipment and takes less time, which can improve the production efficiency of the electronic expansion valve 10 .

Further, the guide sleeve 300 and the connecting seat 200 are connected by riveting. At this time, the connecting seat 200 is made of stainless steel, and the guide sleeve 300 can be made of aluminum alloy. The alloy material has the advantages of light weight, high strength, good sealing performance, corrosion resistance, and relatively low cost. Using the guide sleeve 300 made of aluminum alloy can achieve lightweighting and further reduce the production cost of the electronic expansion valve 10 .

Of course, the guide sleeve 300 and the connecting seat 200 can also be connected through snapping or other connection methods, and there is no specific limitation on this.

Please refer to FIGS. 1 to 6 . In one embodiment, the electronic expansion valve 10 further includes a valve seat 600 and a valve needle assembly 700 . The valve seat 600 is provided on the guide sleeve 300 . The valve seat 600 has Valve port 610, the first valve chamber 121 and the second valve chamber 122 can be connected through the valve port 610; the valve needle assembly 700 is movably provided on the guide sleeve 300, the valve needle assembly 700 includes a valve stem 710 and a valve head 720 connected to the valve stem 710. The valve head 720 is movably inserted in the valve port 610. The valve stem 710 is along the axial direction of the valve port 610. It can move back and forth to drive the valve head 720 to open or close the valve port 610 . The valve seat 100 also has a first interface 140 and a second interface 150. The guide sleeve 300 has a medium flow chamber 330. The first interface 140 is connected with the first valve chamber 121. The first valve chamber 121 is connected to the medium flow chamber 330, the valve port 610 is connected to the second valve chamber 122, and the second valve chamber 122 is connected to the second interface 150; when the valve head 720 opens the When the valve port 610 is opened, the first interface 140 and the second interface 150 are connected.

Specifically, the guide sleeve 300 has a medium flow chamber 330 and an installation port 340 . The medium flow chamber 330 is connected to the first valve chamber 121 , and the first valve chamber 121 is connected to the first interface 140 . The valve seat 600 is installed at the installation port 340 and is sealingly connected to the guide sleeve 300. The valve seat 600 has a valve port 610. The valve port 610 is connected to the second valve chamber 122, and the second valve chamber 122 is connected to the second interface 150. The medium flow chamber 330 may be connected with the valve port 610 . When the electronic expansion valve 10 is working, the fluid medium will first enter the first valve chamber 121 from the first interface 140, then enter the medium flow chamber 330 through the first valve chamber 121, and then exit from the valve in the medium flow chamber 330. The port 610 flows out to the second valve chamber 122 and finally flows out through the second interface 150 . The first interface 140 and the second interface 150 are used to connect pipelines. It should be noted that the fluid medium can flow in from any one of the first port 140 or the second port 150 and flow out from the other port, and there is no specific limitation on this.

Please refer to Figure 1. The valve needle assembly 700 includes a valve stem 710 and a valve head 720 connected to the valve stem 710. The valve port 610 is connected to the second interface 150, and the valve port 610 is used to supply the valve head 720 of the valve needle assembly 700. Insertion, thereby blocking the fluid medium in the electronic expansion valve 10 from flowing out through the valve port 610 . When the valve head 720 of the valve needle assembly 700 closes the valve port 610, that is, when the medium flow chamber 330 and the valve port 610 are disconnected, the electronic expansion valve 10 is closed. At this time, the fluid medium cannot flow from the first interface 140 to the second interface 150. ; When the valve head 720 of the valve needle assembly 700 releases the seal on the valve port 610, that is, when the medium flow chamber 330 and the valve port 610 are connected to each other, the electronic expansion valve 10 is opened. At this time, the fluid medium can flow from the first interface 140 to the third port. Two interfaces 150. Wherein, the inner wall of the valve port 610 forms a flow adjustment surface, and the flow adjustment surface extends obliquely downward. The shape of the valve head 720 is cylindrical. When the valve head 720 contacts the flow adjustment surface, the valve head 720 The valve port 610 is completely closed. When the valve head 720 moves upward, there is a gap between the valve head 720 and the flow adjustment surface, and the gap will continue to increase as the valve head 720 moves upward, and the fluid medium will flow through the gap. The valve head 720 controls the flow rate of the fluid medium in the electronic expansion valve 10 by controlling the size of the gap between the valve head 720 and the flow adjustment surface.

Please refer to Figure 1. In one embodiment, the electronic expansion valve 10 further includes a nut assembly 800 and a rotor assembly 900. The nut assembly 800 is threadedly connected to the valve needle assembly 700. The rotor assembly 900 is sleeved on The valve needle assembly 700 can drive the valve needle assembly 700 to rotate relative to the nut assembly 800, so that the valve stem 710 reciprocates along the axial direction of the valve port 610 to drive the valve head. 720 opens or closes the valve port 610.

Specifically, the nut assembly 800 is fixedly connected to the connecting seat 200. The nut assembly 800 has a nut. The nut is threadedly connected to the valve stem 710 of the valve needle assembly 700. The rotor assembly 900 is connected to the valve stem 710 of the valve needle assembly 700. The valve stem 710 is connected. Since the nut and the valve stem 710 form a threaded matching relationship of the nut and the valve stem 710, the rotation of the rotor assembly 900 can drive the valve stem 710 to rotate, thereby causing the valve stem 710 to telescopically move along the axis of the valve port 610. The valve stem 710 drives the valve head 720 to move, thereby opening or closing the valve port 610 .

The working principle of the electronic expansion valve 10 is as follows:

When the stator assembly is energized, a magnetic field is generated. The rotor made of magnetic material rotates under the drive of the magnetic field. The rotor is fixedly connected to the valve stem 710. The rotation of the rotor drives the valve stem 710 to rotate. A nut valve stem 710 is formed between the valve stem 710 and the nut. The nut assembly 800 is fixedly installed on the connecting seat 200, so the rotation of the valve stem 710 relative to the nut will drive the valve stem 710 to telescopically move relative to the nut, thereby realizing the stator assembly driving the rotor assembly 900 to move, and the rotor assembly 900 driving the valve. The working process of needle assembly 700 movement.

The valve head 720 moves toward the valve port 610 driven by the valve stem 710. When the valve head 720 closes the valve port 610, that is, when the medium flow chamber 330 and the valve port 610 are disconnected, the electronic expansion valve 10 is closed. At this time, the fluid medium It cannot flow from the first interface 140 to the second interface 150; when the valve head 720 releases the seal on the valve port 610, that is, when the medium flow chamber 330 and the valve port 610 are connected to each other, the electronic expansion valve 10 opens, and at this time the fluid medium can flow from The first interface 140 flows to the second interface 150 . Since the opening diameter of the valve port 610 in the electronic expansion valve 10 is relatively small, the flow rate of the fluid medium is reduced, thereby realizing the process of throttling and depressurizing the fluid medium by the electronic expansion valve 10 .

Please refer to Figure 1. In one embodiment, the electronic expansion valve 10 further includes a valve housing 1000. The valve housing 1000 is a cylindrical structure with one end open. The valve housing 1000 and the connecting seat 200 Connect and cover the valve needle assembly 700 , the nut assembly 800 and the rotor assembly 900 . Specifically, the valve housing 1000 is generally cylindrical in design, and the valve housing 1000 and the connecting seat 200 can be fixed by welding. A receiving cavity is formed inside the valve housing 1000. In addition to the nut assembly 800 and the valve needle assembly 700, the receiving cavity also houses a rotor assembly 900. The rotor assembly 900 is connected to the valve stem 710. The valve stem 710 is driven by the rotor assembly 900. The valve head 720 is rotated downward to open or close the valve port 610 . When the electronic expansion valve 10 is working, the fluid medium can flow into the accommodation cavity.

This application also proposes a refrigeration equipment, which includes the above-mentioned electronic expansion valve 10 . The specific structure of the electronic expansion valve 10 refers to the above-mentioned embodiments. Since this refrigeration equipment adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, and will not be discussed here. Let’s go over them one by one. Wherein, the refrigeration equipment is an air conditioner, a freezer, a refrigerator or a heat pump water heater, etc.

The above are only optional embodiments of the present application, and are not intended to limit the patent scope of the present application. Under the inventive concept of the present application, any equivalent structural transformation made by using the contents of the description and drawings of the present application, or direct/indirect Application in other related technical fields is included in the scope of patent protection of this application.

Claims

An electronic expansion valve, wherein the electronic expansion valve includes:

A valve seat with a port formed at one end, and a valve cavity connected to the port formed in the valve seat;

A connection base is provided at the port;

A guide sleeve is provided in the valve cavity, and the guide sleeve is connected to the connecting seat; and

A support structure is provided on the valve seat and contacts the lower end surface of the guide sleeve to support the guide sleeve.
The electronic expansion valve according to claim 1, wherein a limiting portion is provided on the inner wall of the valve seat, the lower end surface of the guide sleeve is in contact with the limiting portion, and the limiting portion forms the support structure.
The electronic expansion valve according to claim 1 or 2, wherein a first step hole is provided in the valve seat, and the first step hole divides the valve chamber into a first valve chamber and a second valve chamber, The first step hole is connected to both the first valve chamber and the second valve chamber; the inner diameter of the first step hole is larger than the inner diameter of the second valve chamber, and the lower end surface of the first step hole The support structure is formed, the guide sleeve is inserted into the first step hole, and the lower end surface of the guide sleeve is in contact with the support structure.
The electronic expansion valve according to claim 3, wherein the port is connected to the first valve chamber, the inner diameter of the port is greater than the inner diameter of the first valve chamber, and the lower end surface of the port forms a first contact. The connecting seat includes a positioning section and an extension section. The positioning section is connected to the extension section. The outer diameter of the positioning section is larger than the outer diameter of the extension section. The lower end surface of the positioning section reaches the The distance between the first contact surfaces is D, 3 mm>D>0.1 mm.
The electronic expansion valve according to any one of claims 1 to 4, wherein the electronic expansion valve further includes a sealing structure, the sealing structure includes a first sealing member, and the outer wall surface of the guide sleeve is provided with a first sealing member. groove, the first sealing member is disposed in the first groove and contacts the inner wall surface of the valve seat; or, the inner wall surface of the valve seat is provided with a first groove, and the first sealing member The sealing member is disposed in the first groove and contacts the outer wall surface of the guide sleeve.
The electronic expansion valve according to claim 5, wherein the sealing structure further includes a second sealing member, a second groove is provided on the outer wall surface of the connecting seat, and the second sealing member is disposed on the second sealing member. groove, the second sealing member is in contact with the inner wall surface of the valve seat; or, the inner wall surface of the valve seat is provided with a second groove, and the sealing member is disposed in the second groove, so The second sealing member is in contact with the outer wall surface of the connecting seat.
The electronic expansion valve according to any one of claims 1 to 6, wherein the connecting seat has a first through hole and a second through hole communicating with the first through hole, and the guide sleeve includes a mounting portion , the mounting part extends into the second through hole and is connected with the connection base.
The electronic expansion valve according to any one of claims 1 to 7, wherein the connecting seat and the guide sleeve are welded.
The electronic expansion valve according to any one of claims 1 to 7, wherein the connecting seat is made of stainless steel, the guide sleeve is made of aluminum alloy, and the connecting seat is riveted to the guide sleeve.
The electronic expansion valve according to any one of claims 3 to 9, wherein the electronic expansion valve further includes a valve seat and a valve needle assembly, the valve seat is provided on the guide sleeve, the valve seat has a valve The first valve chamber and the second valve chamber can be connected through the valve port; the valve needle assembly is movably provided on the guide sleeve, and the valve needle assembly includes a valve stem and the valve stem. A valve head connected to a valve stem. The valve head is movably inserted into the valve port. The valve stem can reciprocate along the axial direction of the valve port to drive the valve head to open or close the valve. mouth.
The electronic expansion valve according to claim 10, wherein the valve seat further has a first interface and a second interface, the guide sleeve has a medium flow chamber, and the first interface is connected with the first valve chamber, The first valve chamber is connected to the medium flow chamber, the valve port is connected to the second valve chamber, and the second valve chamber is connected to the second interface; when the valve head opens the valve When connected, the first interface and the second interface are connected.
The electronic expansion valve according to claim 10 or 11, wherein the electronic expansion valve further includes a nut assembly and a rotor assembly, the nut assembly is threadedly connected to the valve needle assembly, and the rotor assembly is sleeved on the valve needle assembly. The valve needle assembly can drive the valve needle assembly to rotate relative to the nut assembly so that the valve stem reciprocates along the axial direction of the valve port to drive the valve head to open or close the valve port. .
A refrigeration equipment, wherein the refrigeration equipment includes the electronic expansion valve according to any one of claims 1 to 12.
The refrigeration equipment according to claim 13, wherein the refrigeration equipment is an air conditioner, a freezer, a refrigerator or a heat pump water heater.